footer{
    background-color: black;
    width: 37.5rem;
    height: 5rem;
    position: fixed;
    bottom: 0;
    z-index: 1000;
}
footer section{
    display: flex;
    justify-content: space-around;
    padding: 0.8rem;
}
footer section a {
    display: block;
    height: 3.5rem;
    color: #666;
    font-size: 1.1rem;
    text-align: center;
    background-size: 1.95rem !important;
    line-height: 5.7rem;
    overflow: hidden;
}
footer section a:nth-of-type(1) {
    background: url('../images/icon/home_a_icon.png') no-repeat top center;
    filter: grayscale(100%);
}

footer section a:nth-of-type(2) {
    background: url('../images/icon/movie_n_icon.png') no-repeat top center;
}

footer section a:nth-of-type(3) {
    background: url('../images/icon/cinema_n_icon.png') no-repeat top center;
}

footer section a:nth-of-type(4) {
    background: url('../images/icon/find_n_icon.png') no-repeat top center;
}
footer section a:nth-of-type(5) {
    background: url('../images/icon/mine_n_icon.png') no-repeat top center;
}
footer section a:nth-of-type(1)[class="active"] {
    filter: grayscale(0%);
}

footer section a:nth-of-type(2)[class="active"] {
    background: url('../images/icon/movie_a_icon.png') no-repeat top center;
}

footer section a:nth-of-type(3)[class="active"] {
    background: url('../images/icon/2-电影院.png') no-repeat top center;
}

footer section a:nth-of-type(4)[class="active"] {
    background: url('../images/icon/Pointer-指针.png') no-repeat top center;
}
footer section a:nth-of-type(5)[class="active"] {
    background: url('../images/icon/mine_a_icon.png') no-repeat top center;
}
footer section a[class="active"] {
    color: brown;

    
}
